Fix auditd container monit startup issue (#21979)

Why I did it
new added auditd container failed to be launched due to monit blocker.

How I did it
Skip the unexpected container check logic

How to verify it
Verify via auditd image

Author: FengPan-Frank

files/image_config/monit/container_checker

@@ -216,11 +216,6 @@ def main():
         print("Expected containers not running: " + ", ".join(not_running_containers))
         sys.exit(3)
 
-    unexpected_running_containers = current_running_containers.difference(expected_running_containers)
-    if unexpected_running_containers:
-        print("Unexpected running containers: " + ", ".join(unexpected_running_containers))
-        sys.exit(4)
-
 
 if __name__ == "__main__":
     main()